#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
int main()
{ 
	double a = 0;
	double b = 0;
	double sum = 0;
    scanf("%lf %lf", &a, &b);
	sum = a + b;
	printf("sun=%lf\n", sum);


	return 0;
}